"The scientific evidence on different "weighted products" has been documented and accepted for a long time" 
"The scientific evidence shows how the weighted product sends a sensory feeling to the body giving the wearer a feeling of calm and comfort and helps to curb anxiety". 
When we put our COOLDOG harness on many different dogs they loved the soothing comfy feeling we knew then we discovered something very special. 
Examples are ... weighted blankets for people and children "better more restful sleep," apparel for babies for calming soothing and better rest, aiding special needs children with numerous anxieties and their specific challenges such as weighted toys, apparel, blankets, And NOW for dogs.